| Kowalczuk, Mary | Appointed by the Town Moderator | Town Manager | | |
| Kelleher, Karen | Affordable Housing Trust Fund Board | Town Manager | | |
| Key, Laurie | Human Rights Commission, 2024 | Boards & Commissions, Town Manager | | |
| Kelly, Stephen | Constables | Boards & Commissions, Town Manager | (781) 731-0161 | smkelly@aim.com |
| Koch, Kevin | Information Technology Advisory Committee | Boards & Commissions, Town Manager | | |
| Kalauskas, Charles | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Keshian, Richard | Retirement Board | Boards & Commissions, Town Manager | | |
| Kardon, Leonard | School Committee, 2025 | Boards & Commissions, Town Manager | (617) 721-0288 | lkardon@arlington.k12.ma.us |
| Kelley, Kevin | Local Emergency Planning Committee, AFD Chief/EMD Director | Boards & Commissions, Town Manager | | |
| Kiernan, Brendan | Local Emergency Planning Committee, APD Captain | Boards & Commissions, Town Manager | | |
| Kenig Scher, Lidia | Poet Laureate Committee, ACAC Designee | Boards & Commissions, Town Manager | | |
| Kalauskas, Charles | Master Plan Implementation Committee | Boards & Commissions | | |
| Kelder, Brian | Open Space Committee, Resident | Boards & Commissions | | |
| Katofsky, Ryan | High School Building Committee | | | |
| Kelley, Kevin | Municipal Vulnerability Preparedness, Arlington Fire Chief | | | |
| Krinsky, Lisa | LGBTQIA+ Rainbow Commission, 2024 | | | |
| Kelleher, Karen | Housing Plan Implementation Committee | | | |
| Kmetz, Sarah | Zero Waste Arlington | | | |
| Katofsky, Ryan | Clean Energy Future, Chair | | | |
| Korman-Houston, Shaina | Redevelopment Board (1/31/2026) | | | SKorman-Houston@town.arlington.ma.us |
